It will be different because automation has never before been able to fulfill all human niches. Automating one job just freed up people to work in other jobs. I

It will be different because automation has never before been able to fulfill all human niches. Automating one job just freed up people to work in other jobs. In particular, automating physical labor freed people up to work in cognitive tasks. This time it's the entire human niche that will (eventually) be automated - all cognitive tasks as well as all physical ones. That's the difference and why extrapolating from the past doesn't work for AGI.